Type-writing machine.



G. A. SEIB.

TYPE WRITING MACHINE.'

APPLIGATION PILE MAR. 1a, 1006.

Patented Jau 25, 1910.

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TTFiNE'Y UNITE Arana critics..

GEORGE A. SEIB, OF SYRACUSE, NEW YORK, ASSIGNORTO THE MONARCH YPEWRITER COMPANY, 0F SYRACUSE, NEW YORK, A\CORPORATION 0F NEWIORK.

TYPE-WRITING MAINE.

Specification of Letters Patent.

Patented Jan. 25, 1910.

Application filed March 16, 1906. Serial No. 306,332.

T o all whom it may concern:

Be it known that I, Gnomi: A. Sens, citizen of the.' United States, and resident ot Syracuse, in the county of Onondaga and State of New York, have invented certain new and useful Improvements' in Type- Writing Machines, of which the following is a specication.

My invention relates to platen releasing mechanism for typewriting machines and has for its main object to provide improved devices for connecting and disconnecting the platen from its line space `wheel whereby said platen is enabled to be turned, at the will of the operator, irregular distances in dependent of said line space wheel.

To the above and other ends the invention consists in the features ot' constructiomcombi'nations of devices and arrangements ot' parts hereinafter full described and par ticularly pointed out 1n the claims.

ln the accompanyingdrawings, Figure 1 is a fragmentary longitudinal sectional view of a platen and its sup ort showing my invention. Fig. 2 .is an en argetl end view ot the right-hand platen finger wheel and the devices contained therein7 a part, hereinafter termed a releasing cam member, being removed to give a clear view of the interior of the finger wh'cel. Fig. 3 is a de tached face view of a part hereinafter termed a toothed wheel drawn to an enlarged scale. Fig. l is a central longitudinal sectional view of the toothed wheel shown in Fig. 3. Fig. 5 is a detached face view ot' a part., hereinafter termed the detent support or sleeve, drawn to au enlarged scale.. Fig. G is a central longitudinal sectional view of the sleeve shown in yFig. 5, part of said sleeve being broken away. FQ'. 7 shows detached face .and edge views ol a part hereinafter termed a fulcrum wiro. Fig. 8 is an enlarged perspective View oi' a part hereinafter termed a detent.

ln the drawings, l and 2 are the lett and right-hand side bars respectively ot' a platen frame or 1carrier of any suitable construction. A bearing sleeve 3 is adjustably sccured in the side bar 1. by a set screw 4. A platen axle 5 bears at its left hand end portion in the sleeve 3, and 6 is a platen finger wheel secured to the left. hand end ot' the platen axle by a screw 7. The platen may be of any suitable construction, that shown in the drawings generally resembling inner end ot' the sleeve .3 and being provided with a {lange let which has secured to it', by i means ot screws l5, a line space wheel 1G provided with crown ratchet teeth 17. A detent roller 18 cooperates with the teeth of the line space wheel to maintain the latter in any desired position, said roller being nvoted on the end of a spring arm 1 9 which 1s suitably secured to a lug 2t) projecting inwardly from the side bar 1. Line spacing devices (not shown) of suitable construction are adapted to cooperate with the line space wheel to give it line space movements.

The right hand platen head 21 is secured to the core 8 by wood screws 22, said platen head beingprovidcd with an outwardly pro jccting centraiiboss or hub 23, the end whereo't is Yformed with i111 annular groove or raccway which receives anti-friction balls 24, said balls cooperating with the bottom ot' a cap-piece which abuts against. the inner face of the side bar 2, the construction being such that. end thrust is readily taken` up. The cap piece and the right hand platen head are centrally perforated to receive a sleeve portion ot a soa'falled det'cnt holder, support'. or sleeve lo which is shown in detail in lligs. 5 and (3 and comprises an elongated body or sleeve portion 27 and a head Q8. 'lhe platen is maintained in a lixcd relation with said holder by a set screw 2S) which enl ters a threaded opening in the hub 253 of the right-hand platen head and abuts against the body or sleeve portion 27 ot the holders' 26 near its inner or lcl'tliand ond. The holder 26 is bored out centrally as indicated at 30 to permitI o't' the passage ot' the platen axle, and the head 28 is counterbored as inA dicatcd at 30 for a purpose presenti to appear; The head 28 of the holder or s ocvc'A is provided with a series ol radial slots 31, twenty ot said slots being shown in the drawings, although it is to be understood that a greater or less number may be c|nployed. As shown most clearly in Fig. 6,

roo

i having a central hub or boss 48 which abuts i the bottoms of the slots 31 are beveled or inclined, so that said bottoms are contained n the. surface of a cone, the apex whereofl .ies 1n the center of rotation of the platen lnwardly or toward the left hand of the head 28. The periphery of the head 28 is provided with an' annular groove 32 which receives a fulcrum ring 33 made preferably of spring wire, said ring being best shown inl Fig. 7 and being split as indicated at 34 in said figure. v

Arranged in each slot 31 is a holding member or detent 35 which islbest shown in Fig. 8. Each detent 35 is perforated as shown at 36 to allow the fnlcrum wire dtoA pass through, said wire serving as a pivot or ulcrum for all the detents. Each detent carries a flat spring 37 said spring being received in a kerf inthe outer facefof the detent, thewalls ofthe kerf being pressed toward eachother tohold the spring 37 in place. The inner edge of each detent is vrounded as indicated at 38 and the right hand end of the detent is beveled as indicated at 39. The counter bore 30a in the head of the holder 26 receivesthe central hub or boss 40 4of a wheel 41, shown in detail in Figs. 3 and 4. The wheel is perforated as indicated at 42 to allow it to be mounted -on the platen axle and is maintained in fixed relation with said axle by a pin or rivet 43 which is driven through said axle and'y throughv openings 44 in' the hub of the wheel. The wheel 41 is provided with a series of radially disposed Ateeth 45, there being one more of sald teeth than there are detents 35, so that, ,in this case, the teeth 45are twenty-- one lin number. The peripheries.,- of the teeth'45`-ar'e beveled as shown at 46,.the inclination of the bevel corresponding substantially with the inclination of the bottoms of the slots 31 in the head 28 of the holder 26. n

A iinger wheel 47 ,is provided at the right hand end of the platen, said linger wheel against the outer face of the sidebar 2 and is secured in fixed relation with. the sleeve 26 by a set screw 49. The body portion of the linger wheel .47 is elongated and hbllow, serving, as clearly shown in Fig. 1, as a housing or cover for the detents 35 and their support, and also for the toothed wheel 41 with which said detents coperate, these devices forming a two-part clutch mechanism,

the operation of which is to be described later. The outer or right hand end of the finger wheel 47 is open, and fitting into the open end of said finger wheel is a releasing ,cam member. 50 having" a coned cam face 51 adapted to coperate with the beveled edges 39 of the detentsz The cam member is counterbored at 52 andy is slidably mounted on the end ofl the'. platen axle 5,bei'ng'held against displacement therefrom by a headed screw 53 which passes through the counterbore and enters a threaded opening 54in the end of the platen axle 5. The inner fece ofthe cam member 50 is -provided with a` deep annular groove 55 which receivesma coiled expansion spring 56, the outer end whereof bears against the bottom wall of the annular groove. The inner end.' of said" 23 of the platen 21, and is properl secured by the set screw 29. Thereafter t e platen axle 5 with the toothed wheel 41 fixed there-A j on, is'passed through the bore 30 of the holder 26 from the right-hand side of theme;-

platen toward the left and asses throu hthe bore of the sleeve 12, w ich, with t e line space wheel attached, is passed down between the end'of the platen and the side bar l. The left-hand end of the shaft is also passed through the bearing sleeve Sand projects beyond the bar 1. The platen axle 1s arrested by the contact of the inner face of the toothed wheel 41 with the outer face of the head 28 and thereaftervthe sleeve 12 is fixed to said axle by the set screw 13 and the left-hand finger wheel 6 is secured in loo place. The cam member 50, with its spring i 56 in place,.is now inserted in the right-han laten head 47 and secured in place by the eaded screw 53.

It will be noted that the line space wheel 16 is fixed to the platen axle 5 which. also has fixed to it the toothed wheel 41. lt will also be noted that the detent holder 26 is fixed to the platen and that the finger wheel 47 is also fixed to said holder. The springs- 37 of the .detents 35 contact with the inner surface of the finger wheel 47 and tend constantly to press said detents toward a common center, said center being in the longitudinalaxis of the platen. The series of detents are disposed substantially longitudinally of the platen axle and their springs 37 press them toward the toothed wheel 41. The number of the teeth 45 in said wheel exceed the number of detents by one, it will rief be recalled, so that one only of the detents I at a time can ever enter the wheel 41 between two of the teeth 45. This will be best understood from a consideration of Fig. i wherein, it will be noted, the detent at the top and center is engaged with the o ening between tw'o of the teeth 45, while a l of the other detents engage and are pressed against-the peripheries of the teeth 45. The 'date-nt adjacent to the engaging detent at cachside has its rounded edge 258 iust ready to enter the space between two ot the teeth ,45, so that a Slight relative movement between the toothed wheel t1 and the dctent supporting member in either direction would enable one or the other ot' these two teeth o prcssed'into engaging position by its spring.

'lo enable the relative movement between the two parts to be effected it is, of course, necessary to move the engaging detent to inoperative position and this movement of the detent may be caused by pressing the cam member 50 inwardly against its spring 5b' and so that the cam face 51 of said member, pressing against the beveled edge 3f) of the engaging detent, will 'force the latter outward radially of the platen until the lower edge ot' said dctent clears the toothed wheel tl. It will be apparent that when this disengagement takes place the cam face 51 will be in engagement with the inclined edges of the other detents so that, on further inward movement of the cam member 50, the entire series of detents will be moved outwardly away Afrom the common center toward which they are pressed by their springs, and will be separated entirely from the toothedl wheel 111. It now, the pressure against the cam member 5() be maintained and rotary movement be communicated to the finger wheel 47, the platen will be turned with Said finger wheel but the line space. wheel lt will rcmain motionless... since it has been disconnected from the platen by the se )a'ration ot' the detents 35 from the toothed wlieel 4l and is therefore held against movement at this stage by the roller '18. When the parts are thus disconnected a rotary movement ot' the platen will carryl with it the detent support- 21' and the detents 35. lt will be apparent from what has already been said and from a consideration of Fig. 2, that a.slight rotary n'iovement communicated to said dctents will be sufiicient to bring one or another of them into position to be seated in one or another ot the openings between the teeth of the wheel 4l. and to positively' connect the lino spacing wheel and platen to rotate together. As hasbeen stated there are twentyone of these teeth and twenty detents. so that a very slight relative rotary movement between the platen and line spacing wheel, of approximately onc-twentiet of one. of the teeth 4V, will be snllicient to bring a dctent. into position to engage with thc toothed wheel. and that at every additional slight relative rotary movement. another one of th(` dctents will in turn be brought to position to engage the toothed wheel between two of its teeth. iVhen the )laten has been rotated indepcmlcntly of the ine space wheel to the desired position by i ot' the width i means of the finger wheel 47, the caln member 50 is released by the operator and said member will be restored to normal position by its spring 56, thereby permitting one of the detcnts 35 to engage operatively with the toothed wheel t1 and restoring operative connection between the platen and its line Ispace wheel. In operating the platen releasing mechanism the second finger of the right hand of the operator `is preferably employed to move the cam member 5() inwardly. thus leaving the thumb and fore finger of `the right hand free to turn the platen finger wheel 4T.

It will be noted that by my invention provide means for treeing the platen trom ,the control of the line space wheel so as to enable. said platen to be tul'ned irregular distances ranging from the most minute to a complete rotation or more; that said means comprises a two-part clutch device which positively unites the parts. one of said members of said two-part clutch device. that is the detent support 20 and thc detents 35. being fixed to the platen and the other of said parts. that is the toothed wheel 41, being fixed to the line space wheel; and that this two-part clutch device is outside of the platen and is housed or inclosed in one of the platen finger wheels, the releasing member serving as a closure for said linger wheel and the construction being such that the parts ot` the platen releasing mechanism may be removed tor repair or adjustment without dismembering the platen as is usually necessary with this class of devices. l `\uthermorc, it will be seen that actuation o'f-the clutch releasing means is -ett'ccted by pressure exerted longitudinally ot' the platen so that there is no danger in eti'ccting a relative accidental displacemtait between the line spacing wheel and platen by the pressure exerted to efi'ect a clutching and unclutching engagement between the parts.

Where in the following claims itI is recited that a detent support and detents pifotcd thereon are maintained in fixed retation with another part. what is meant is that there is no'movement of translation of the dctent support and the detents with respect to said other part.: and not of course that the detents may not receive rotary movements on their pivots.

Various changes may be made in the details ot' construction and arrangelmnts of parts without departing from the scope of my invention.

What. l claim as new and desire. to secure by Letters Patent, is:n

fl. In a typewriting machine. the combination of a cylindrical platen. a linel space wheel. a two-part clutch device. one part comprising a toothed wheel and the other part (,'omprisinga plurality ot pivoted detents the number of said detents being one less than the number of the teeth in said toothed Wheel, one of the parts of said clutch device being maintained in a lined relation with the platen and the other part in a tixed vrelation With the line space Wheel, `and means 4for moving said detente intoy and out of engagement With said toothed Wheel.

2. In a typevvriting machine, the combination of a cylindrical platen, a line space wheel, a toothed Wheel having a fixed relation with said line space Wheel, a detent support Yhaving a lined relation With said platen, `ay Vplurality of detenta` pivot/ed on f. and means for moving said detents into and.v

said support and numbering one less than the number of teeth in said toothed Wheel,

out vof .engagement with said toothed Wheel.

3. In a typewriting machine, the combi-` `.nation ot a cylindrical. laten, a line space wheeha two-part clutc device one part vcomprising a toothed Wheel and the other A V'part a'plur'ality of pivoted detents, the parts of said clutch device being mainone of tained in arixedrelation with the platen `-fand the other part in a fixed. relation with the line vspape operative on said detente to cam them out fof engagementwith said toothedwheel, one

only of said'r'detentsbeing fully engaged of said 'clutclr` device being maintained in a. fixedrelation with the platen and thel i Y otherrpart in a iixedrelation With theline space wheel, and means for moving said detents intoy and out of engagement with friaid toothed Wheel, one only of said detents being 4fully engaged with said toothed vvheel i at onetime.

' i1-'5. In a typewriting machine, the combina parts tionpof a cylindrical platen, a line space. Wheel, a two-part clutch device .one part comprising a sleeve havingr radial slots convtaining detents and the other part comprising-a-wheel having radial teeth, oneof the of said clutch device/being maintained in a lixed relation with the platen and the other part with the line space wheel, and a cime-shaped cam operative to press said del,tents out of engagement with 'saidftoothed "'1 Wheel.

'.r'wheel, ay twomart clutch" device one -parttaining l ing` av Wheel having radial teeth',':the .ninnaeabeeaf meteen; of en mandaten; ax;

' 6.-.;In a typevvriting thecombination of a: cylindrical "platenfaline space comprising a sleeve having radiall'slotscon# detente and the other'fpart'compris wheel, and a cam member.

` naled thereon, a

Wheel,

ceeding the number of detente 'by one, one of the parts of said clutch device being maintained in a ixed relation with the platen and the other part With the line space Wheel, and a cone-shaped cam operative to press said detente/out of engagement with said toothed Wheel.

7. In a typewriting machine, vthe combination of a line space Wheel, a platen adapted to move relatively thereto, a sleeve lilxedly connected with the platen and provided With a plurality of radial slots, spring detents pivotally vmounted in the slots of said sleeve, a .Wheel fixedly connected With A said line space Wheeland havin a plurality of radial teeth vvithwhich said spring detents are adapted to engage, a cone-shaped cam operative to disengage said spring` detents from said toothed Wheel, and a spring acting to maintain said cone-shaped cam in inoperative position.

8. 1n a typewriting machine the combination of a line space wheel, a platen adapted to .move relatively thereto, a sleeve fiXedly connected with the platen and provided with of radial slots, a ulcrum Wire a plurality on said sleeve, spring detente pivoted on said fulcrum Wire and guided in said slots, a Wheel maintained in a fixed relation with said line spacewheel and havin a plurality of radial teeth with which sai s ring detents are adapted to engage, sai detents being operative one at a time, the number of radial slots bein one greater than'the number of spring etents, a cone-shaped cam operative to disconnect said spring detent's from said toothed Wheel, and a spring acting to render said cam normally inoperative. v

' 9. In a typevvriting` machine, the combination of a platen frame, 'a platen axle jourlaten journale/d on said axle, a line space wheel lined to said axle at one end o said platen,- a sleeve fixed to said platen at?v the other vend thereof and provided With a series of radial slots, a 'ulcrum Wire on said sleeve, a series of spring detents contained in said slots land pivoted on said fulcrum wire, a Wheel. Xed -to said platen axle. adjacent to said slotted sleeve and L provided with a plurality of radial teeth with which the detente engage, anda cone-shaped cam slidable on` said yplaten axle and operative to disconnect saidlspri'ng detente fromsaid toothed Wheel. t

10. In a typewriting machine, A-the combination 'of a cylindrical platen, a line space a' two-part clutch operative to conneet and disconnect said platen andA said line space Wheel', a hollow En er Wheel for said platemsaid linger wheell) end, said linger Wheel being .operative to turnl said 4platen and4 serving as a housing fon saidtw-part clutch,

saidgcliitchinoperative, said means eingopen at one I servinnr as a closure for the opening in Said D finger Wheel.

l 11. ln a typewriting 111aeh1ne, the combi- `lination of a platen4 frame, a platen axle jourllnaled thereon, a platen jonrnaled on Said laxle, a line space Wheel fixed to said axle., a

twopart clutch device one part fixed to said l "platen axle'and the other part to said platen, ll and a platen finger wheel fixed to said 10 platen and operative to turn the same, said v15 jonrnaled thereon, a platen journaled on said axle, al line space Wheel fixed to said agile, a two-part clutch device one part fixed to said platen'axle and the other part le said platen,.11'1ea11s slidable v(1n-said platen axle 4l'er unelntehing 4said eluteh device, and a hollow finger wheel fixed to said platenand operative to turn the same Said finger wheel being' open at one end and serving 'to house the two-part 'elnteh device, said slidable unelntehing' .means serving' as a cles-nre for the open end of' said platen finger wheel.

Signed at Syracuse, in the county of Onondaga, and State 'of New York this 12th day of March 1\. D. 1906.

GEORGE A. SEIU. p

'it nesses:

Jon): S. l\I1'rC111-11.11, lV. J. LOGAN. 

